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by gshdg 2251 days ago
Anything published without a copyright notice still has a copyright.

> Until March 1, 1989, a published work had to contain a valid copyright notice to receive protection under the copyright laws. But this requirement is no longer in force — works first published after March 1, 1989, need not include a copyright notice to gain protection under the law.

https://fairuse.stanford.edu/overview/faqs/copyright-protect...